Quiz 5 Solutions 1.a) X = vegeta ; X = goku ; X = gohan ; X = trunks ; false. 1.b) X = vegeta. 1.c) false. 1.d) Z = [b]. 1.e) X = ["kittens!", 14, a]. 2. Note that there was a typo in the example: it should be true. not R = true.. even([]). even([_|T]) :- \+ even(T). Another acceptable (though more verbose) way to do this is to find the length of the input list and then check that the length is even.